The towering redwood fell victim to a lightning strike in early 1988.
It was split asunder in one of the frequent thunderstorms that struck Wairarapa that summer, often accompanied by strong northwesterley winds that damaged trees.
Soon afterwards, a decision was made to fell the tree for safety reasons and when arborists counted the rings it was realised the redwood was one of the original McCardle plantings of 1878.
At that time, borough councillor John McDonald was keen to have timber from the tree milled and used elsewhere in the park but it was found the wood was not suitable for construction.
Mr McDonald then persuaded the council to erect a shelter over the stump, roofed with shingles cut from redwood.
The shelter - called a "dendrochronology" from the Greek words for tree (dendron), time (chronos) and study (ology) - was built in 1991.
Vandalism of the stump has distressed Masterton people, who have contacted the Times-Age asking for council action to be taken to preserve what remains of the redwood, on the grounds the stump is historic and a legacy of the original park plantings.
Comments made in an editorial written by the newspaper's editor Andrew Bonallack last Friday have drawn fire.
Mr Bonallack said it was difficult to get excited about "a large lump of dead tree" and suggested the only thing lacking was "a stick of dynamite to finish it off".